The users-owners of weighbridges used in livestock marts are, under the Markets and Fairs (Weighing of Cattle) Act, 1891, required to have the weighbridges tested twice yearly by the legal metrology service. Since that time, the technology used in weighing instruments has advanced significantly. Accordingly, account was taken of these advances in the drafting of inspection requirements in the European Communities (Non-Automatic Weighing Instruments) Regulations, 1992. These regulations prescribe that non-automatic weighing instruments should be inspected at least once every two years. Mart weighbridges fall within this category.
The National Standards Authority of Ireland has advised me that at least one inspection has been carried out on 148 weighbridges in 65 marts by the legal metrology service in the past twelve months. There are approximately 230 weighbridges in use in the 119 livestock marts operating throughout the country.
The assessment of weighbridges is carried out in the following manner: an evaluation of conformity of the instrument under test to an approved design is undertaken. This is followed by metrological tests using reference standards of mass to establish accuracy within legally defined tolerances. Upon successful completion of the examination and tests, official marks are applied to the instrument signifying conformity.